At higher levels of haste in a few patches are set bonus will become pretty useless... just imagine if we had 5% reduction cast time on MB now. Pretty useless.

Oh, I agree - I'd much rather have seen a flat .1 seconds off. But my point was that they clearly didn't care about shadow when they changed the current live 4pc bonus from reducing WS cooldown, which did a practical benefit to shadow, to reducing PoM cooldwn, which offers none. Now that they've finalized what it will be in S9, where they're differentiating it from the healing set, why can't they make that hotfix for current live sets?